Original Xiaomi Mi TDS Pen Tester

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TDS is measured in PPM, that is, part per million, or particles per million. In other words, 300 ppm means that there are about 300 units of detectable substances in a million water particles.

2

Xiaomi Mi TDS Pen measures TDS between 0 and 1000+ PPM. Remember the meaning of these indicators can always be seen from the image above, but in practice it is useful to remember only that less than 50 is very pure water, 100-300 is ordinary water, usually from a tap, 1000+ - water not suitable for drinking.

Appearance and deviceExternally, the water tester Xiaomi resembles a conventional thermometer, and by the way, it really knows how to measure the water temperature (although it does not show it), in order to take this index into account when determining the mineralization, and to eliminate its effect on the results.

4

On both sides Xiaomi Mi TDS Pen is closed with caps. Under one there are two batteries type LR44 (come with the kit), and under the other - a probe tester made of titanium.

3

On the device itself there is only one on / off button, and to get the results it is enough to lower the probe of the water tester, after which it will instantly show the TDS level.

TestingWe did not check the results in the laboratory, but the values ​​shown by Xiaomi Mi TDS Pen are quite in line with expectations.

6th

Four types of water were compared from one pipe:

HotColdFiltered (reverse osmosis filter)Filtered (reverse osmosis filter), passed through the mineralizerHot water, which is also often called technical, predictably showed the worst result in the region of 300+ units. Cold water was slightly cleaner - 240 units.

As a device for water treatment, a Ukrainian standard filter was used: a reverse osmosis membrane (manufactured in the USA), and several prefilter filters.

The usual filtered water showed a result just above 20 PPM, that is, according to TDS standards it is very clean. If it is passed through the mineralizer in addition, the predicted TDS will increase, but not much. Up to 30 PPM, so that water can still be considered clean ..

Features & PerformanceThe Mi TDS Pen can measure the TDS (Total Dissolved Solids) concentration in water. This is not a complete water analysis but TDS is the most common parameter for water testing. The dissolved solids include any salts, minerals, metals, cations or anions dissolved in water, so the lower amount of these solids, the purer the water. The TDS level is measured in parts per million (ppm) or mg/L. The ideal TDS reading for drinking water should be less than 300ppm.

The Mi TDS Pen is quite easy to use. It includes two button cells already, so it’s ready to use out of the box. You will just need to take the pen cap off, place the head of the pen under water, then the TDS reading will immediately show up on the display.

tested it with the tap water and purified water in my house and the results seem to be accurate. The tap water has the TDS level of 170 ppm while the purified water is much lower at 14 ppm.

Therefore, I highly recommend the Mi TDS Pen if you want to check water quality or performance of your water purifying system.

Features & PerformanceThe Mi TDS Pen can measure the TDS (Total Dissolved Solids) concentration in water. This is not a complete water analysis but TDS is the most common parameter for water testing. The dissolved solids include any salts, minerals, metals, cations or anions dissolved in water, so the lower amount of these solids, the purer the water. The TDS level is measured in parts per million (ppm) or mg/L. The ideal TDS reading for drinking water should be less than 300ppm.

The Mi TDS Pen is quite easy to use. It includes two button cells already, so it’s ready to use out of the box. You will just need to take the pen cap off, place the head of the pen under water, then the TDS reading will immediately show up on the display.

tested it with the tap water and purified water in my house and the results seem to be accurate. The tap water has the TDS level of 170 ppm while the purified water is much lower at 14 ppm.

Therefore, I highly recommend the Mi TDS Pen if you want to check water quality or performance of your water purifying system.

I was not sure in the quality of the water what we are drinking home, this is why i was ordering the product. The quality of the product is really good, really easy to use, just put the pen to the water what you would like to check and press the button. If you are pressing that button again, device is turning off. Really fast you can check the result. I was comparing the water at home with some mineral waters, and the mineral waters had a little bit better (lower) scores. Unfortunately the box and the small guide is only in Chinese, but luckily on the Gearbest website you can see in English which score is meaning which water quality. The product has a cap, what is saving the pen. You don't need to buy batteries, the pen is containing the 2 batteries, what you can reach if you remove the cap the other side of the pen. Recommended product.

A handheld water quality checker made by the well known Xiaomi. The TDS tester can be used to verify the total dissolved solids in the water. You can ask why should I buy this device when I know that my drinking water quality is high? Well we don’t have an answer to it but when you are living in a developing country where water has to be treated you can use this device to check the quality of the water. Or when you are travelling and want to know the quality of the water of the Ganges in India or when you a just a curious person of course. Anyway this device works like a charm despite the fact that the standard manual is in Chinese. See more details at: http://www.compareimports.com/blog/xiaomi-water-quality-tester-tds-pen/

Suggestion

No English manual See more details at: http://www.compareimports.com/blog/xiaomi-water-quality-tester-tds-pen/

First we have to know that a TDS pen is used to measure the ion concentration, which is not completely equivalent to how clean your water is. If you are worried about chlorine concentration, or the bacteria concentration, then this will be useless to you. The best use of this is to estimate if it's already about time to change the filters of your water cleaning system or, if you want to maintain the ion concentration in your fish tank.

Pros: 1. Dummy-proof operation. Just hit the button once, immerse the electrode head in the water, then you can see the measurement. And then, hold the button again to turn it off. 2. Looks solidly built and stylish.

Customer Questions & Answers

Is this a 1 time use device as in I use it on e and that's it I can't use it anymore ?

By Chris Nov-09/2018 22:15:53

A

Hello Chris,

Thank you for your inquiry.

It is reusable.

Q

What model/type of button cell it uses?

By Paulius Mar-23/2017 13:14:33

A

Hello Paulius, It is AG13 button cell.

Q

Does it sync results to smartphone?

By Timo Jan-20/2017 13:08:09

A

Hello TimoIt doesn' supports sync results to smartphone

Q

Hi! It is available on this product unique number? and whether http://www.mi.com/verify official website can check it out?
Regards
Andrei

By Andrei Jan-07/2017 20:03:50

A

Hello Andrei,

Thank you for your inquiry.

It is in stock, Please feel free to make your order.

Thank you, Let me know if you need any help.

Have a nice day!

Q

She measures the PH of the water

By erivaldo Dec-29/2016 01:05:24

A

Hello Erivaldo,I am sorry to tell you that it can not measure the PH but can measure the TDS.

Thanks for your attention.

Q

detect mercury

By jose Dec-15/2016 16:50:30

A

Hello jose,

Thank you for your inquiry.

Pen which can test the quality of the water, it also determines whether purification is required. Mi TDS Pen reacts to organic compounds, and heavy metals like nickel, chromium etc. and soluble salt content. The pen is IPX6 waterproof and has automatic temperature calibration and precision in measurement.

Please feel free to contact us if further questions.

Thank you for your attention.

Q

Does it detect Free chlorine in the water?
Thanks

By Diego Aug-28/2016 21:34:43

A

Hello Diego,It cannot detect Free chlorine in the water .

Q

Hi, it is in stock?

By Viktor Nov-29/2015 21:22:12

A

Hi Viktor, This item is in stock for immediate shipping now. We hope you enjoy shopping here with us.

Q

what does it test , ppm only or ph and tds as well ?

By h Sep-01/2015 00:57:03

A

Hi H，it is ppm only for TDS. Thank your for your inquiry. Please feel free to ask if you have further questions.

Q

Will it show bacteria content info like ECOLI

By ajithissac Sep-01/2015 00:38:10

A

Hi Ajithissac,it only shows ppm of TDS. The detect range is 0-999. Please kindly watch the video about this item to know further at the link below: https://www.youtube.com/watch?v=AXp7L6j1nkg Thank your for your inquiry. Please feel free to ask if you have further questions.

Q

Is this a 1 time use device as in I use it on e and that's it I can't use it anymore ?

By Chris Nov-09/2018 22:15:53

A

Hello Chris,

Thank you for your inquiry.

It is reusable.

Q

What model/type of button cell it uses?

By Paulius Mar-23/2017 13:14:33

A

Hello Paulius, It is AG13 button cell.

Q

Does it sync results to smartphone?

By Timo Jan-20/2017 13:08:09

A

Hello TimoIt doesn' supports sync results to smartphone

Q

Hi! It is available on this product unique number? and whether http://www.mi.com/verify official website can check it out?
Regards
Andrei

By Andrei Jan-07/2017 20:03:50

A

Hello Andrei,

Thank you for your inquiry.

It is in stock, Please feel free to make your order.

Thank you, Let me know if you need any help.

Have a nice day!

Q

She measures the PH of the water

By erivaldo Dec-29/2016 01:05:24

A

Hello Erivaldo,I am sorry to tell you that it can not measure the PH but can measure the TDS.

Thanks for your attention.

Q

detect mercury

By jose Dec-15/2016 16:50:30

A

Hello jose,

Thank you for your inquiry.

Pen which can test the quality of the water, it also determines whether purification is required. Mi TDS Pen reacts to organic compounds, and heavy metals like nickel, chromium etc. and soluble salt content. The pen is IPX6 waterproof and has automatic temperature calibration and precision in measurement.

Please feel free to contact us if further questions.

Thank you for your attention.

Q

Does it detect Free chlorine in the water?
Thanks

By Diego Aug-28/2016 21:34:43

A

Hello Diego,It cannot detect Free chlorine in the water .

Q

Hi, it is in stock?

By Viktor Nov-29/2015 21:22:12

A

Hi Viktor, This item is in stock for immediate shipping now. We hope you enjoy shopping here with us.

Q

what does it test , ppm only or ph and tds as well ?

By h Sep-01/2015 00:57:03

A

Hi H，it is ppm only for TDS. Thank your for your inquiry. Please feel free to ask if you have further questions.

Q

Will it show bacteria content info like ECOLI

By ajithissac Sep-01/2015 00:38:10

A

Hi Ajithissac,it only shows ppm of TDS. The detect range is 0-999. Please kindly watch the video about this item to know further at the link below: https://www.youtube.com/watch?v=AXp7L6j1nkg Thank your for your inquiry. Please feel free to ask if you have further questions.

Q

HI IT IS IN STOCK ?

By grimaldi.giorgio Aug-25/2015 09:57:36

A

Hi grimaldi.giorgio, It is in stock and is available for purchase now. But there are a lot of customers placing order on our website, so it will not be in stock at any time. Thanks for your understanding!

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After receiving your order,we require some time to test the product to ensure its quality.The exact processing time varies depending on the item.The average processing time is 3 working days.but this can also be affected by the item's stock status. For small quantity orders,the processing time is 1-3days while larger quantity orders may require 2-5days.

2

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Shipping Type

Country or Region

Arrive within 1-7 Days

Arrive within 8-15 Days

Arrive within 16-30 Days

Arrive within 31-45 Days

Average Time (Days)

Unregistered Air Mail or Registered Air Mail

United States

0.52%

44.87%

49.88%

3.5%

18.13

Spain, United Kingdom, Italy, Germany, France & Portugal

5.18%

43.44%

48.34%

1.17%

15

Netherlands, Greece, Poland, Hungary, Slovakia, Czech Republic

2.96%

40.34%

52.54%

3.74%

18.66

Russia

0%

4.45%

84.41%

11.1%

28

Japan, Korea

0%

21.30%

68.80%

9.66%

17.75

Brazil

0%

0%

23.91%

72.09%

38.6

Turkey

0%

37.75%

59.05%

3.1%

20.33

Thailand, Singapore & Malaysia

0%

40.39%

56.12%

2.6%

16.2

Other countries

0.7%

38.79%

47.94%

8.56%

23.57

Priority Line

United States

12.28%

79.05%

7.4%

0.52%

11.75

Spain, United Kingdom, Italy, Germany, France & Portugal

8.44%

66.56%

23.45%

0.45%

13.55

Russia

0%

3.48%

75.79%

20.04%

31

Brazil

2.21%

6%

61.29%

25.46%

30

Turkey

20.42%

77%

3%

0.08%

10

Australia

7.67%

86.60%

5.68%

0%

11

Korea

97.54%

1.57%

0.89%

0%

7

Japan

95.80%

2.09%

0%

0%

6.84

Thailand, Singapore & Malaysia

58.96%

41.04%

0%

0%

8.45

Other countries

22.33%

30.8%

27.62%

17.64%

18.65

Expedited Shipping

ALL countries(EMS)

3.8%

46.8%

26%

15%

14.8

ALL countries(DHL)

65.8%

25.75%

3.86%

0.37%

6.72

GW Warehouse: Typically 3-5 days to the UK, 3-7 days to other European countries.

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Shipping from warehouse nearest to shipping address is faster. Additional charges may apply.

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